As the others said, itching is normal during healing. It might help to take a little Benadryl. Check with your doctor on that, but I don't think there's any reason you can't take it. Redness is also normal, but as you already found out, if there's any oozing or it feels warm to the touch, then you need to get it looked at.
Hope you're doing better today. This is a long recovery, so listen to your doctor, no bending lifting or twisting, and rest a lot, with as much walking as you can tolerate in between rests.
Let us know if you have other questions. We're not experts, but we'll try to help.
Take care,
Emily